$(function () {
  $bigPic = $('#bigPic')
  $smallPic1 = $('#smallPic1')
  $smallPic2 = $('#smallPic2')
  $smallPic3 = $('#smallPic3')
  $smallPic4 = $('#smallPic4')
  $smallPic5 = $('#smallPic5')

  $smallPic1.mouseenter(function () {
    $bigPic.attr('src', './img/big/big1.jpg')
  })
  $smallPic2.mouseenter(function () {
    $bigPic.attr('src', './img/big/big2.jpg')
  })
  $smallPic3.mouseenter(function () {
    $bigPic.attr('src', './img/big/big3.jpg')
  })
  $smallPic4.mouseenter(function () {
    $bigPic.attr('src', './img/big/big4.jpg')
  })
  $smallPic5.mouseenter(function () {
    $bigPic.attr('src', './img/big/big5.jpg')
  })
})
